1. Department of CardiologyIsala Heart Center Zwolle The Netherlands
2. Cardiovascular DepartmentUniversity of Trieste Trieste Italy
3. Department of CardiologySt Antonius Hospital Nieuwegein The Netherlands
4. Diagram CRO Zwolle The Netherlands
5. Department of CardiologyUniversitats Klinik Heidelberg Germany
6. Department of CardiologyKerckhoff Klinik Bad Nauheim Germany
7. Department of CardiologyMaastricht University Medical Center Maastricht The Netherlands
8. Department of CardiologyZuyderland Medical Center Heerlen The Netherlands